Lianas. Cymes racemelike. Calyx with basal glands. Corolla tube basin-shaped; lobes valvate, abruptly narrowed into long tips. Corona adnate to gynostegium, deeply 5-parted; lobes flat, oblong-quadrangular, apex notched. Filaments connate; anthers nearly square, apex threadlike; pollinia 2 per pollinarium, erect. Stigma head short conical, apex notched. Follicles smooth.

One species: endemic to China.